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<!DOCTYPE html>
<title>Encoding API: Byte-order marks</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
var testCases = [
{
encoding: 'utf-8',
bom: [0xEF, 0xBB, 0xBF],
bytes: [0x7A, 0xC2, 0xA2, 0xE6, 0xB0, 0xB4, 0xF0, 0x9D, 0x84, 0x9E, 0xF4, 0x8F, 0xBF, 0xBD]
},
{
encoding: 'utf-16le',
bom: [0xff, 0xfe],
bytes: [0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C, 0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xDB, 0xFD, 0xDF]
},
{
encoding: 'utf-16be',
bom: [0xfe, 0xff],
bytes: [0x00, 0x7A, 0x00, 0xA2, 0x6C, 0x34, 0xD8, 0x34, 0xDD, 0x1E, 0xDB, 0xFF, 0xDF, 0xFD]
}
];
var string = 'z\xA2\u6C34\uD834\uDD1E\uDBFF\uDFFD'; // z, cent, CJK water, G-Clef, Private-use character
testCases.forEach(function(t) {
test(function() {
var decoder = new TextDecoder(t.encoding);
assert_equals(decoder.decode(new Uint8Array(t.bytes)), string,
'Sequence without BOM should decode successfully');
assert_equals(decoder.decode(new Uint8Array(t.bom.concat(t.bytes))), string,
'Sequence with BOM should decode successfully (with no BOM present in output)');
testCases.forEach(function(o) {
if (o === t)
return;
assert_not_equals(decoder.decode(new Uint8Array(o.bom.concat(t.bytes))), string,
'Mismatching BOM should not be ignored - treated as garbage bytes.');
});
}, 'Byte-order marks: ' + t.encoding);
});
</script>
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